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QProcess readLine from qDebug()

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  • L Offline
    L Offline
    louis
    wrote on last edited by
    #1

    Hi,
    i started a qt-based qProcess

    i connect connect(appProcess, SIGNAL(readyReadStandardError()), this, SLOT(readStandardOutput()));

    void AppControl::readStandardOutput()
    {
    while(m_trmAppProcess->canReadLine())
    {
    qDebug() << "fromAppProcess: " << m_trmAppProcess->readLine();
    }

    but this would not work properly.
    however i can see that the signal is emitted properly so i run into the readStandardOutput function.

    canReadLine() will return false.

    how can i get those messages?

    rgards

    1 Reply Last reply
    0
    • VRoninV Offline
      VRoninV Offline
      VRonin
      wrote on last edited by
      #2

      readyReadStandardError() is emitted when cerr has data. you need to call setReadChannel to specify you want to read from cerr and not cout.

      void AppControl::readStandardOutput()
      {
      m_trmAppProcess->setReadChannel(QProcess::StandardError);
      while(m_trmAppProcess->canReadLine())
      {
      qDebug() << "fromAppProcess: " << m_trmAppProcess->readLine();
      }
      }

      "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
      ~Napoleon Bonaparte

      On a crusade to banish setIndexWidget() from the holy land of Qt

      1 Reply Last reply
      2
      • L Offline
        L Offline
        louis
        wrote on last edited by
        #3

        Thank You. That worked!

        1 Reply Last reply
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